Water purification unit



Aug. 11,1953

C. B. MOLLER WATER PURIFICATION UNIT Filed Oct. 1, 1949 I0 is 3a ea a eaInverzi'oai: OZIJfoddB.MOZZeIg Patented Aug. 11, 1953 UNITED STATESPATENT OFFICE WATER PURIFICATION UNIT Clifiord B. Moller, Boston, Mass.

Application October 1, 1949, Serial No. 119,163

2 Claims.

This invention relates to improvements in a water purification unit.Water purification systems of the type to which this improvement relatesinclude pumping means for feeding hypochlorite or other waterpurification chemical in minute quantities and at a carefully regulatedrate into the intake line of a pump which feeds the water from itssource of supply. See for example the patent to Corydon 2,402,524. Thechemical pumping unit is sometimes provided with an anti-siphon deviceto prevent the suction in the water line from drawing the chemical at afaster rate than that fixed by the operation of the chemical pump.

It is an object of my invention to provide with the anti-siphon device,means to permit priming the pump when the system is being started.

Various advantages of my improvements will be more readily apparent fromthe following description of a preferred embodiment thereof asillustrated in the accompanying drawings, in which:

Figure 1 is a side elevation of the chemical pumping unit; and

Figure 2 is a vertical section taken on the plane indicated 22 in Figure1.

The pump includes a casing In which may be made of metal. The head I2 ispreferably made of neoprene or other material that will be resistant tothe corrosion action of the chemical and the pumping diaphragm I4 isalso made of neoprene. The diaphragm is operated by the reciprocalplunger IS, the stroke of which is carefully adjusted. The pumpingchamber 18 has an inlet passage 20 and an outlet passage 22. The inletnipple 24 has an inlet valve 26. The outlet nipple 28 is incommunication with the passage 30 which is normally closed by a flexiblediaphragm 32 which is fastened to the head I2 of the pump by the cover34. A spring 36 is provided to move the diaphragm 32 in the direction toclose the passage 30 and provide an antisiphon check valve. The spring36 seats on a cup-shaped member 38 which is preferably molded to theouter side of the diaphragm 32. I provide a finger-grip member 40 whichis connected to the cup-shaped spring seat 38 and which extends throughan opening in the housing 42 for the spring. By manually pulling uponthe finger grip 40 the diaphragm 32 may be pulled away from its seat andpermit primin of the pump.

The chemical pumping unit is connected to a source of supply of thewater purification chemical whereby the action of the, pump will drawthe chemical into the inlet 24 through the passage 20 and into thepumping chamber l8. The chemical will be delivered on the pressurestroke through the passage 22 thereby moving the diaphragm 32 to openthe entrance to the passage 30. The chemical will be delivered throughthe outlet passage 28. It will be understood that the outlet passagewill be connected to the suction side of a water pump drawing water froma suitable reservoir. The chemical will be delivered to the water at acarefully regulated rate. Such a system is frequently used at summercamps and if the system stands idle for a long period of time thechemical pump will need to be primed. In such case, the water pump isstarted while the diaphragm 32 is pulled away from its seat at theentrance to the passage 30 by means of the finger-grip member 40. Thesuction in the water line will draw the chemical into the pumpingchamber 18 and prime the pump. As soon as the pump has been primed, thefinger grip 40 is released and the system operates in the usual manner.

I claim:

1. In a pump for feeding a water purification chemical, a casing havinga pumping chamber, an outlet passage leadin from said pumping chamber, asecond outlet passage in said casing adjacent said first passage andleading to the exterior of the casing, a diaphragm valve mounted toclose both said outlet passages, spring means effective to hold suchdiaphragm valve in closed position during the intake stroke of the pumpand adapted to yield and permit opening of the valve on the deliverystroke of the pump, and a finger grip attached to said diaphragm valveand extending to the exterior of said pump casing, whereby said fingergrip may be pulled to open the diaphragm valve to permit priming of thepump.

2. In a pump for feeding a water purification chemical, a casing havinga pumping chamber and a fiat valve seat, a delivery passage leading fromsaid chamber to said valve seat, an outlet passage leading from saidvalve seat, a diaphragm mounted on said seat so as to cover the adjacentends of said passages, a spring normally urging said diaphragm intoengagement with said seat but yieldable on the delivery stroke of saidpump to permit movement of said diaphragm so as to uncover saidpassages, and a finger grip attached to said diaphragm and extending tothe exterior of said pump casing, whereby said diaphragm may be pulledaway from said seat to permit priming of the pump.

CLIFFORD B. MOLLER.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,990,635 Buttner Feb. 12, 1935 2,323,950 Wade July 13, 19432,402,524 Corydon June .18, 1946 2,427,441 Butts Sept. 16, 1947

